I am in the last stages of completing a new instrument here at Sea Ranch,
CA, and a nice quake came along and I was able to see it on the
tiltmeter! 


The quake was: 

M4.4 64km from Sea Ranch, CA USA, 5 km ( 3 mi) ESE of The Geysers, CA 


and the PSN server tiltmeter files are:


050509.223742.srt.psn 

left	This actually shows the P and S arrivals,
but the quality is terrible as the quake sloshes the mercury and this is
a high-Q oscillation. Oh well, I built it to detect Earth tides primarily
and any quake detection is just icing on the cake.


and 050509.223011.longsrt.psn

leftThis is a longer time plot of the above
and I am not certain, but it looks like the ground maybe changed tilt
when the quake arrived???


If this project is of interest to you, go to my website at
http://ntweb.mcn.org/gbush and click on The "Tiltmeter Project" and you
can see my writeup and pictures on the construction of the instrument.





George Bush

Sea Ranch, CA, USA

38.73775N, 123.48882W